4 papers · 1 filter
Spin Structure Functions of the Nucleon
Xiangdong Ji
I begin with a general discussion about importance of constructing a picture of the nucleon in terms of QCD degrees of freedom, emphasizing the role of spin structure functions. I…
Matching Perturbative and Non-Perturbative Physics With Power Accuracy in Heavy-Quark Effective Theory
Xiangdong Ji
I discuss a scheme to match perturbative and non-perturbative physics with power accuracy in the heavy-quark effective theory. I elaborate on two important aspects of the scheme: 1…
Exact Matching Condition for Matrix Elements in Lattice and Schemes
Xiangdong Ji
The exact matching condition is given for hadron matrix elements calculated in any two different schemes, in particular, in the lattice and dimensional regularization, (modified) m…
WILSON'S EXPANSION WITH POWER ACCURACY
Xiangdong Ji
Because of the infrared renormalons, it is difficult to get power accuracy in the traditional approach to the Wilson's operator product expansion. Based on a new perturbative renor…